bijoykjose11Yes this happens. phone trys to enter recovery/reboot but unfortunately if it is unable go beyond asus boot image than thats definate something triggering with your motherboard please dont try to play with those buttons for several times because there is possibility that it may effect your motherboard and there are chances of more damage to hardware. Best option before you try workarounds yourselves Go give a visit to local repair shop and see if they bring up helpful.
I have a note for those who face this issue. With the phone connected to the charger if you press both the volume up and volume down keys along with the power button key simultaneously u can turn ON the phone. phone will switch ON for some seconds. But unfortunately it will turn OFF by itself after sometime